Ethereum: how to make sendRawTransaction in bitcoind JSON-RPC using the bitcoin-core package in nodejs

Here is an article that explains how to send a “RawTransaction” in JSON-RPC format using the Bitcoin Core package in Node.js:

Sending Raw Transactions in JSON-RPC Format with the Bitcoin Core Package in Node.js

In this article, we will show you how to send a “RawTransaction” in JSON-RPC format using the Bitcoin Core package in Node.js.

Prerequisites

Before you begin, make sure you have the Bitcoin Core package installed and are running a compatible version of it. Also, make sure you have a Bitcoin Core node running on your machine with a valid address for which you want to send the raw transaction.

Install the required packages

To use the Bitcoin Core package in Node.js, we need to install the bitcoin-core package using npm:

npm install bitcoin-core --save

Send raw transaction in JSON-RPC format

The following code snippet demonstrates how to send a `RawTransaction'' in JSON-RPC format using the Bitcoin Core package:

const BitcoinCore = require('bitcoin-core');
// Configure the Bitcoin Core connection
const bc = new BitcoinCore({
url: " // replace with the URL of your Bitcoin Core node
});
// Create a new transaction object
const tx = {
version: 1,
hash: "your_tx_hash_here",
from_address: "your_from_address_here",
to_address: 'to_address_here', // optional
flags: "raw" // optional, can be one of "full", "confirm", or "send-only"
};
// Create a new raw transaction object
const rawTx = {
tx_type: "sendrawtransaction",
raw: tx
};
// Send the raw transaction in JSON-RPC format using Bitcoin Core
bc.sendRawTransaction(rawTx, (error, response) => {
if (err) {
console.error('Error sending raw transaction:', err);
} else {
// Get the transaction hash from the response
const txHash = response.hash;
console.log(Transaction hash: ${txHash});
}
});

In this example, we create a new transaction'' object with the desired properties (version, hash, from address, to address, and flags). We then create a new raw transaction object with the same properties. Finally, we send the raw transaction in JSON-RPC format using thesendRawTransactionmethod of the Bitcoin Core connection.

• Therawproperty on thetxobject specifies that we want to send a raw transaction.

• You can customize the raw transaction by providing additional flags (e.g.confirm,send only) or by adjusting the properties of thetransactionobject.

• The response from Bitcoin Core includes ahash` field for each raw transaction. This hash can be used as a reference to verify the integrity of the transaction.

Following these steps, you should now be able to send raw transactions in JSON-RPC format using the Bitcoin Core package in Node.js.